Hampton



(No'Model.-) G-Shets-S-heet 1, E. A. DAVIES & S. T. THOMAS. APPARATUSFOR REMOVING SGALE FROM SHEET METAL.

Patented 001;. 12,1897.

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(No Model.) fi-sheetssheet 2. E. A. DAVIES & S. T. THOMAS. APPARATUS FORREMOVING SCALE FROM SHEET METAL.

No. 591,621. Patented Oct. 12, 189.7.

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(No Model.) 6 Sheets-Sheet 3.

E. A. DAVIES St S. T. THOMAS. APPARATUS FOR REMOVING SCALE FRDM SHEETMETAL.

N0. 591,621. Patented Oct. 12,1897.

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E. A. DAVIES & S. T. THOMAS. APPARATUS FOR REMOVING SCALE PROM SHEETMETAL.

No. 591,621. Patented Oct. 12,1897.

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' E. A. DAVIES 85 S. T. THOMAS.

APPARATUS FOR REMOVING SCALE FRQM SHEET METAL.

No. 591,621. Patented Oct. 12,1897.

Wu'fl/ MCI 6J4- In z wziu zr." g C t M 4 (No Model.) 6 Sheets-Sheet E.A.-DAVIES 8; S T. THOMAS. APPARATUS FOR REMOVING SCALE PROM SHEET METAL.

Patented Oct. 12,1897.

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UNITED STATES PATENT OFFICE.

EDTVARD ALBERT DAVIES AND STEPHEN THORPE THOMAS, OF WOLVER- HAMPTON,ENGLAND, ASSIGNORS TO DAVIES BROTHERS & 00., LIMITED, OF SAME PLACE.

APPARATUS FOR REMOVING SCALE FROM SHEET METAL.

SPECIFICATION forming part of Letters Patent No. 591,621, dated October12, 1897.

Application filed May 19, 1897. Serial No. 637,182. (No model.)

To all whom it may concern: nace, taken on line c of Fig. 1. Fig. 4eis aBe it known that we, EDWARD ALBERT section, to an enlarged scale, of oneof the DAVIES and STEPHEN THORPE THOMAS, subsprocket-wheels used withthe endless chains jects of the Queen of Great Britain, residing whichpass through the furnace, and shows 5 at \Volverhampton, in the countyof Stafford, also a side elevation of a portion of one of theEngland,have invented certain new andusechains. Fig. 5 is a plan of thewheel and ful Improvements in Apparatus for Use in length of chain shownby Fig. 4. Fig. 6 illus- Removing-Scale which has been Raised on thetrates, in plan view, also to an enlarged scale, Surfaces of MetalSheets, of which the followapparatus constructed according to this inroing is a specification. vention for the purpose of removing scale Thisinvention has for its object improvefrom the surfaces of metal sheetswhich has ments in apparatus for use in detaching from been previouslyraised thereupon in a suitthe surfaces of metal sheets-such, forinablefurnace. Fig. 7 is alongitudinal section stance, as those which areintended to be galtaken on line woc of Fig. 6. Fig. 8 is a plan 15vanized or otherwise coated with metal or view of a modified form of theapparatus for metallic alloy-scale which has been raised detaching thescale from metal sheets. Fig. thereupon in any suitable scaling-furnace,9 is a longitudinal section taken online y y and more especially theemployment of such of Fig. 8. Fig. 10 is a detached section, toapparatus with a scaling-furnace such as an enlarged scale, of the framecarrying the 20 that hereinafter described, through which the heaterswhich are used in the modification sheets are carried by means ofendless chains. shown by Figs. 8 and 9. Fig. 11 is a side The scale isdetached from the surfaces of elevation of a short length of such frame.the sheets, according to this invention, by Referring first to Figs. 1to 5, the furnace means of apparatus which comprises a numillustrated bysuch views is formed with a 25 her of beaters, which as a sheet istraveling heating-chamber A for the sheets. This along with the undersurface supported upon chamber is of a width to suitthe maximum a plateorbacking strike the upper surface width of the sheets which are to bescaled thereof with great rapidity in such manner therein and is of alength which is considerthat nearly every portion of the upper surablecompared with its width, being conven 3o face of the sheet receives asharp blow on its iently about thirty to thirty-five feet in lengthpassage through the appliance. The scale is between the doors. Each endof the chamber thus thoroughly loosened and detached from A is normallyclosed by means of a door B, both surfaces of the sheet. Each sheet iscapable of being raised .in vertical guides in drawn into the apparatusby means of'a pair the usual manner of raising similar doors, so 3 5 offeed-rolls and passes away therefrom as to completely open the ends.These doors,

through a pair of withdrawing-rolls, the blows however, when closed donot completely close being struck upon the upper surface of the the endsof the chamber A, but leave a space sheet by a number of beatersarranged in poat each end between the floor of the chamber sition tostrike upon the portion of the sheet A and the lower edge of thecorresponding 0 which is passing the two pairs of rolls. 'door throughwhich the sheets are carried. 0

Figure 1 is a longitudinal section through The doors B do not appear inFig. 2, as the a furnace such as it is preferred to use for section ofsuch view is taken at a level imraising thescale upon the surfaces ofthe mediately below the bottomsof the doors. sheets, and shows also theappliances by Endless chains a pass around wheels I), which 45 means ofwhich the sheets are carried autoare in position some distance from thefeed- 5 matically into, through, and out from the furing-in end of thefurnace, and around nace. Fig. 2-is a sectional plan of thefursprocket-wheels c, which are in position a nace, and shows also, inplan view, the apshort distance beyond the delivering end of pliancesfor carrying the sheets therethrough. the furnace, and these chains passthrough 50 Fig. 3 is a transverse section through the furthe chamber Aof the furnace and run upon I00 plates (Z upon the bottom of thechamber. The under sides of the chains run along metal channels 6, whichpass alsov through a hollow space 0, formed underneath the chamber A ofthe furnace. The spindle carrying the sprocketwheel c is drivencontinuously from any suitable source of power, and the links of thechains are caused to move constantly through the chamber A in thedirection of the arrow f, Fig. 1. Each pair of side links of the endlesschains 11 are formed with projections a, (see Figs. at and 5,) uponwhich the sheets are placed for being carried into and through thechamber A by the movement of the endless chains; The portions of theendless chains a which are at any time passing from the wheels b towardthe furnace are carried by rollers g, which are capable of rotating inbearings supported by longitudinal bearers h. The chains may betightened from time to time, as the joints thereof wear, byscrew-tightening devices 1', which; draw back along guides on theirsupporting-bed the bearings which support the spindle j, carrying thewheels b. Furnace-grates Dare-arranged along one side of' theheating-chamber A and are provided with suitable joining doors k. Theproducts of combustion from the furnace-grates D pass over the top of awall Z, which divides them. from the heatingchamber A, and thence intothe heatingchamber, and pass away from such chamber through flues m atthe bottom. of the wall on the opposite side of such chamber, andthenceinto a flue E, running along the side of the chamber, and thence througha fine F to the chimney. The chamber is maintained at a temperaturewhich causes the sheets to be heated to a bright-red heat, and thescaleis thus raised on the surfaces of the sheets in a manner whichadapts it to be readily removed by the apparatus hereinafter described.The

doors B are normally down while the sheets are being carried into,through, and out from the heating-chamberA, and are required only forobtaining access to the interior of the chamber for the purpose ofrepairs or incase of a sheet getting-out of place during; its passagetherethrough.

Referring now to the apparatus shown by Figs. 6 and 7, n n are a pair offeeding-in rolls mounted in suitable hearings in. the fixed framing G ofthe apparatus, and ooare a pair of corresponding withdrawing-rolls. pis. afi'xed supporting-plate along which the sheets pass between therolls n n and the rolls 0 0.v q are a number of heaters, each formedconveniently of a flat section of bar shaped longitudinally, as shown.The heaters are pivoted at their hinder ends to a round transverse bar'1', which is fixed at each end. to the framing of the machine. Theheaters are arranged, as seen on plan, as near together side by side aswill admit of their movement independently of one another and are keptapart the required distance by washers 8 around the bar 1', and as anadditional precaution are guided at their forward ends by guides 8',carried by a transverse bar 8 The heaters are formed so that when downupon the sheet, as shown by full lines, Fig. 7, a considerable length ofstraight flat portion bears upon the surface of a sheet. The hinder 5end of each beater is bent up conveniently of a curved form to its pivotattachment with the bar 0" and is bent up at its forward end andterminates at such end in a short length of horizontal orhorizontally-inclined portion t. H is a frame rigidly mounted upon aspindle in, which is capable of rotation in bearings carried by theframing of the machine. This frame consists, conveniently, of parts 12,which are of the shape of band-pul- 'leys and which are keyed upon thespindle u, land of longitudinal bars w, of angle-section, lwhich arefixed at. intervals apart to the rims of the pulleys. As the frame iscaused to rotateinthe direction of the arrow a, Fig; 7, ithe angle-barsw operate in succession to lift the forward ends of the heaters eachinto the position indicated by broken lines, Fig. 7, and in passing outof contact with, such ends allow the heaters todrop upon a sheet whichispassing between the feeding in and with- ;drawing rolls. The sheet iscaused to travel along the plate p at a velocity of about twenty to makeabout one hundred rotations per iminute, and thus each beater of therow: of beaters strikes a number of blows in rapid succession upon: thesurface of the sheet with the result that the scale is dislodged fromevery part of the surface of the sheet. The action of the heaters uponthe one side of the f; sheet. dislod'ges the scale not only from such 1'side, but from the other side also, and renders it, unnecessaryto passthe sheets a. secendtime'through the apparatus.

- The apparatus shown by Figs. 6 and 7 may ;be employed for treatingsheets on the sur- 1 face of which the scale has been. raised in any Fsuitable scaling-furnace, but it is preferred (and this. is the moreimmediate purpose of the apparatus)- to use such apparatus with ascaling-furnace such. as that described with '1 reference to Figs. 1, 2,and 3. The line b, Figs. 6 and 7, indicates the end of the furnacethroughv which the sheets pass out to the apparatus for detaching thescale, and the sprocket-wheels 0 correspond to the wheels 0 shown byFigs. 1 and 2. The chains which earry the sheets through the furnace ofcourse travel at the same speed as the surface velocity of the rolls n.n and 0 0. The ;sheets are delivered by the endless chains onto guides cand between the rolls n n. The f forward ends of the sheets are guidedbetween the rolls n n by means of the guides c and a f slanting plated'. The pairs of rolls n nand In Fig. 6' the pair 0- 0 are shown to bedriven by means of a, chain from one of the rolls n,

-' the medium of a shaft e, from which the 5 0 0 may be driven in anyconvenient manner.

feet per minute, and the frame H is caused and the'rolls n are-shown tobe driven through sprocket-wheels c are also driven. The shaft 6 isprovided with fast and loose pulleys f, so that it may be readilystopped and started, and a hand-wheel g is fixed upon one end of suchshaft, so that it may be turned back by hand to reverse the rolls n n incase a sheet enters improperly between the rolls. The spindle to,carrying the rotating frame H, is driven independently of the rolls n nand 0 0, so that it may be caused to rotate only while a sheet ispassing beneath the heaters, and the unnecessary wear and tear be thusavoided which would result from allowing the heaters to strike upon thebacking-plate 19 all the time that the rolls were rotating while a sheetwas not passing beneath the heaters. As the work comes somewhat suddenlyupon the r0- tating frame each time the set of heaters is raised, it ispreferred to drive such frame through the medium of a pinion h on thehand-pulley shaft and a wheel 1" on the spindle of the rotating framerather than to drive with a band passing around a pulley fixed upon thespindle of the rotating frame. The portions k k of the rolls which arebetween the ends of the operative surfaces thereof and the necks arereduced somewhat in diameter to prevent scale from the sheets creepingalong the rolls into the necks. Two or more sets of heaters may beemployed in the treatment, as above described of each sheet upon whichthe scale has been raised in the special form of scaling-furnace abovedescribed or other scaling-furnace, but such will not be foundnecessary.

The apparatusshown by Figs. 8 to 11 differs from that already describedwith reference to Figs. 6 and 7 only in respect of the heaters and themethod of mounting and operating them. In this case a number of wings orbeaters Z, each formed conveniently of a flat sect-ion of steel curvedsomewhat longitudinally, as shown, are hinged or pivoted to the rotatingframe H. The heaters are convenientl y arranged in rows lengthwise ofthe frame, the heaters of one row being placed, preferably, to breakjoint with those of the adjacent row on each side, as clearly shown byFigs. 8 and 11. The frame H, carrying the heaters, is driven to rotatein the direction indicated by the arrow m, Fig. 9, and the heaters arehinged to the frame in such manner that. as the frame rotates they flyout and strike with considerable force upon the surface of a sheet whichis passing between the rolls n n and rolls 0 0. The heater lettered Z ofFig. 10 is shown to be in position in which it would be when upon thesurface 4) of the rotating frame.

of a sheet passing between the pairs of rolls. After a beater has struckthe sheet it is dragged forward thereupon until it is lifted clear againby the rotation of the frame H. The heaters are curved outwardly, asshown, so that their convex surfaces strike upon the surface of a sheet,andthe purpose of forming them of a curved shape longitudinally is toprevent their outer ends striking and indenting the sheet. Plainlongitudinal bars 72 are fixed parallel to the spindle u at equaldistances apart around the rims of the parts The heaters Z[ are pivotedto lugs 0, which are fixed to the bars 1t. Bars 19, also runningparallel with the axis of the spindle u, are fixed to the rims of theparts i; for the purpose of preventing any heaters which are at theupper side of the rotating frame, when such frame is at rest or movingslowly, from falling too much inward. As in this modification the workof the rotatin g frame is tolerably regular, such frame may be driven bymeans of a hand passing around a pulley on the spindle of such frame.

What we claim as our invention, and desire to secure by Letters Patent,is

1. Apparatus for use in detaching, from the surfaces of metal sheets,scale which has been raised thereupon in a suitable furnace, whichcomprises a backing orsupport for the sheets, means for traversing thesheets along the hacking or support, heaters arranged in po-' sitionover the hacking or support, and mechanism for operating the heaters,all substantially as described and shown.

2; Apparatus for use in detaching, from the surfaces of metal sheets,scale which has been raised thereupon in a suitable furnace, whichcomprises a backing-plate or support for the sheets, a pair offeeding-inrolls, a pair of withd rawing-rolls, heaters arranged over thebacking-plate or support, and a rotating appliance for operatingtheheaters, all substantially as described and shown.

3. The combination of the backing-plate or support 19, feeding-in rollsn n, withdrawingrolls 0 0, heaters q, rotating frame H having lifters w,substantially as described and shown, for the purpose set forth.

In witness whereof we have hereunto signed our names in the presence oftwo subscribing witnesses.

Witnesses: I

ARCHER B. SMITH, THOMAS DALLARD.

